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National Instruments 9252 Calibration Procedure

8 ai, ±10 v, 24 bit, 50 ks/s/ch simultaneous
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CALIBRATION PROCEDURE
NI 9252
8 AI, ±10 V, 24 bit, 50 kS/s/ch Simultaneous
This document contains the verification and adjustment procedures for NI 9252. For more
information about calibration solutions, visit ni.com/calibration.
Contents
Software.................................................................................................................................... 1
Documentation.......................................................................................................................... 1
Test Equipment..........................................................................................................................2
Test Conditions..........................................................................................................................3
Initial Setup............................................................................................................................... 3
Verification................................................................................................................................3
Accuracy Verification....................................................................................................... 3
Adjustment................................................................................................................................ 5
Accuracy Adjustment........................................................................................................5
EEPROM Update...................................................................................................................... 6
Reverification............................................................................................................................6
Accuracy under Calibration Conditions....................................................................................6
Revision History....................................................................................................................... 7
Worldwide Support and Services.............................................................................................. 7

Software

Calibrating the NI 9252 requires the installation of NI-DAQmx 19.1 or later on the calibration
system.
You can download NI-DAQmx from ni.com/downloads. NI-DAQmx supports LabVIEW,
™
LabWindows
/CVI
install support for the application software that you intend to use.

Documentation

Consult the following documents for information about the NI 9252, NI-DAQmx, and your
application software. All documents are available on
software.
™
, ANSI C, and .NET. When you install NI-DAQmx, you only need to
ni.com
and help files install with the

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  • Page 1: Table Of Contents

    Accuracy under Calibration Conditions..................6 Revision History........................7 Worldwide Support and Services....................7 Software Calibrating the NI 9252 requires the installation of NI-DAQmx 19.1 or later on the calibration system. You can download NI-DAQmx from ni.com/downloads. NI-DAQmx supports LabVIEW, ™ ™...

  • Page 2: Test Equipment

    Use a high-precision DC voltage source with a gain uncertainty of <57 ppm and an offset uncertainty of <0.6 mV. Chassis NI cDAQ-9178 — DSUB Connection NI 9923 — Accessory For NI 9252 with DSUB variant 2 | ni.com | NI 9252 Calibration Procedure...

  • Page 3: Test Conditions

    Verification The following performance verification procedure describes the sequence of operation and provides test points required to verify the NI 9252. The verification procedure assumes that adequate traceable uncertainties are available for the calibration references. Accuracy Verification Complete the following procedure to determine the As-Found status of the NI 9252.
  • Page 4 COM to give the entire system a ground reference. Set the calibrator voltage to a Test Point value indicated in the NI 9252 Verification Test Limits table. Set the calibrator to Operate mode (OPR).

  • Page 5: Adjustment

    Repeat steps 3 through 7 for each test point in the NI 9252 Verification Test Limits table. Disconnect the calibrator from the device. Table 4. NI 9252 Verification Test Limits Test Points 2-Year Limits Location Value (VDC) Lower Limit (VDC) Upper Limit (VDC) -10.0000...

  • Page 6: Eeprom Update

    Disconnect the NI 9252 from the calibrator. EEPROM Update When an adjustment procedure is completed, the NI 9252 internal calibration memory (EEPROM) is immediately updated. If you do not want to perform an adjustment, you can update the calibration date and onboard calibration temperature without making any adjustments by initializing an external calibration, setting the C Series calibration temperature, and closing the external calibration.

  • Page 7: Revision History

    1 866 ASK MYNI (275 6964). For support outside the United States, visit the Worldwide Offices section of ni.com/niglobal access the branch office websites, which provide up-to-date contact information. NI 9252 Calibration Procedure | © National Instruments Corporation | 7...
  • Page 8 NI trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering NI products/technology, refer to the appropriate location: Help»Patents in your software, the file on your media, or the National Instruments Patent Notice at . You can find patents.txt ni.com/patents...

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